<div class="modal fade  preview-form">
	    <div class="modal-dialog">
	        <div class="modal-content">
	            <div class="modal-header">
	                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
	                <h4 class="modal-title">预览</h4>
	            </div>
	            <div class="modal-body">
	               <iframe id="formIframe"  width="835" height="330" frameborder="no" border="0" marginwidth="0" marginheight="0" scrolling="no" allowtransparency="yes"></iframe>
	            </div>
	            <div class="modal-footer">
	                <button type="button" class="btn btn-info" data-dismiss="modal">返回</button>
	            </div>
	        </div>
	    </div>
</div>